With the Yamaha, midstave I've typically 15 cents either way before the tone starts thinning appreciably. The Wild Thing maybe 20 cents up, 30 cents down. I've said it before, I tend to lip the Wild Thing and work the slides on the Yamaha. Mind you my control is still a bit shabby so other people might find different. I do a lot of sight reading or playing by ear in random keys, and it's surprising how often I end up transposing minor key melodies into E just on sound consistency and ease of playing. When I did the same check on E minor that I did for D major, it came out near perfect without any alternate fingerings at all! I put 30 cents on 1st slide; 10 on 2nd; 30 on 3rd and tweaked main slide in 10 cents. Spot on bar low G and F#, and even they weren't far out.